Polyfunctional (meth)acrylic polymer, coating composition, process for producing a coating and coated article

An acrylic and polymer technology used in the preparation of coatings and coated products can solve problems such as increasing brittleness and achieve the effects of high gloss, good water resistance, long-term storage capacity and durability

Inactive Publication Date: 2012-02-15
EVONIK ROEHM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the hardness is increased by increasing the degree of crosslinking, increased brittleness occurs

Method used

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  • Polyfunctional (meth)acrylic polymer, coating composition, process for producing a coating and coated article
  • Polyfunctional (meth)acrylic polymer, coating composition, process for producing a coating and coated article
  • Polyfunctional (meth)acrylic polymer, coating composition, process for producing a coating and coated article

Examples

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Embodiment 1

[0173] 50.01 g of solvent (Solvesso 100) were initially charged to the reaction vessel and this initial charge was heated to 140°C. Oxygen present in the reaction vessel was removed by introducing nitrogen. Subsequently, a mixture containing 15.33 g of di-tert-butyl peroxide (DTBP), 41.15 g of isobornyl methacrylate (IBOMA), 61.73 g of hydroxyethyl methacrylate (HEMA), 20.58 g of methacrylic acid was added over a period of 4 hours. Reaction mixture of ethylhexyl ester (EHMA), 20.58 g methacryloxy-2-ethyl-fatty acid amide (MUMA), 61.73 g styrene and 3.69 g 2-mercaptoethanol. The reaction was then continued for 30 minutes with stirring. The mixture was then cooled to 80°C. To complete the reaction, a mixture comprising 0.21 g of di-tert-butyl peroxide (DTBP) and 15 g of solvent (Solvesso 100) was added, followed by stirring at 80° C. for a further 2 hours. Subsequently, stirring was continued for a further 30 minutes without heating.

[0174] The polymer content was adjusted...

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Abstract

The present invention relates to a (meth)acrylate polymer for production of a coating composition, wherein the (meth)acrylate polymer contains 0.5 to 20% by weight of units derived from (meth)acrylic monomers, which have at least one double bond in the alkyl radical and 8 to 40 carbon atoms, 0.1 to 60% by weight of units derived from monomers containing hydroxyl groups, said monomers having up to 9 carbon atoms, 0.1 to 95% by weight of units derived from (meth)acrylate having 1 to 12 carbon atoms in the alkyl radical, and 0.1 to 60% by weight of units derived from styrene monomers, based in each case on the weight of the (meth)acrylate polymer, and the (meth)acrylate polymer has a weight-average molecular weight in the range from 2000 to 60 000 g/mol. The present invention further relates to a coating composition and to a process for producing a coating. The present invention further relates to a coated article which comprises a coating obtainable by the process.

Description

technical field [0001] The present invention relates to multifunctional (meth)acrylic polymers and coating compositions. In addition, the present invention relates to a method for producing a coating using such a coating composition, and to the coated articles obtainable by the method of the invention. Background technique [0002] Coatings, especially paints, have long been produced synthetically. An important class of these materials is based on aqueous dispersions comprising (meth)acrylate polymers in many cases. For example, publication DE-A-41 05 134 describes aqueous dispersions comprising alkyl methacrylates as binders. Such paints are also known from US 5,750,751, EP-A-1 044 993 and WO 2006 / 013061. Furthermore, solvent-based coatings which can be crosslinked via polyisocyanates are known inter alia from publication DE-A-27 32 693 . [0003] Furthermore, publication DE 30 27 308 describes coating compositions based on (meth)acrylates which can be oxidatively cross...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/28C08F212/06C09D133/06C09D135/06C09D133/14C09D175/04C08F220/10C08F220/52
CPCC08F212/08C08G18/6266C08G18/73C09D133/066C09D133/14C09D135/06C09D175/04C09D125/14C08F220/1808C08F220/1811C08F220/20C08F220/36C08F220/10C08F220/18C08F220/28C09D133/06
Inventor B·施米特W·克勒塞M·埃伯特T·许茨M·戈梅兹安德鲁
Owner EVONIK ROEHM GMBH
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